Gimbal lock



FIG. 1 is a top perspective view of a gimbal lock.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a left-side view thereof.

FIG. 5 is a right-side view thereof.

FIG. 6 is a top side view thereof; and,

FIG. 7 is a bottom side view thereof. 

CLAIM The ornamental design for a gimbal lock, as shown and described. 